My Audi A4 1.6 started missing at idle and was sluggish to pull away so put new plugs and it seemed to sort it out, it was getting dark and i noticed it was arcing from the ht lead by the top of plug onto engine, spark was dim but every time engine missed it was a bright spark and engine tone changed, i changed ht leads, no effect on arcing so i thought electricity passes route of least resistance so closed gap on plug, it worked no more arcing, engine was 90% better no missing but doesnt pick up on the throttle as it should,( once at 2000 rpm everything is normal) checked the spark plug and seemed a little burnt (number 3 cylinder) I have fitted a new coil and still hesitant but missing has stopped at idle but misses on acceleration, opened the gap agin on plugs but am going to put new ones in tomorrow.
Is there anything else that can cause the hesitation, it happens when its hot or cold, im pretty sure its not the maf because no difference when i unplug it, ive also had vag-com and no codes were showing, only the central locking pump, possible leak so totally unrelated.
Ive changed plugs, leads and coil and engine is still not right, any ideas? The only thing i can think of is fuel but the exaust smell rich and emmisions are higher, but no smoke although there is more steam than usual and water from tailpipe, no smell of antifreeze though.
P.s for those who may have read my previous Thread, i didnt buy the Other Audi in the end as the clutch was slipping aswel so didnt want to get involved with to much work.